394728501 has 8 divisors (see below), whose sum is σ = 526512960. Its totient is φ = 263048192.

The previous prime is 394728493. The next prime is 394728511. The reversal of 394728501 is 105827493.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 394728501 - 2³ = 394728493 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 394728501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394728511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16716 + ... + 32693.

It is an arithmetic number, because the mean of its divisors is an integer number (65814120).

Almost surely, 2^394728501 is an apocalyptic number.

It is an amenable number.

394728501 is a deficient number, since it is larger than the sum of its proper divisors (131784459).

394728501 is a wasteful number, since it uses less digits than its factorization.

394728501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52075.

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 394728501 is about 19867.7754416543. The cubic root of 394728501 is about 733.5552479680. Note that the first 3 decimals are identical.

The spelling of 394728501 in words is "three hundred ninety-four million, seven hundred twenty-eight thousand, five hundred one".